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    <script>
      "use strict";
      function say(a, b) {
        console.log("hello", a + b, this);
      }
      const arr = [100, 200];

      say(arr[0], arr[1]);
      say.call(null, arr[0], arr[1]);
      say.call(null, ...arr);
      say.apply(null, arr);
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